Yes you can blame him (Hamilton) for crashing out, but on the other hand you can't blame him for his tyre situation.
Everyone knows that you should be able to drive flat out and your tires should last. But Lewis' tires did not. so on that part it's the team fault. They should of brought him in but decided to keep him out too long. Secondly lewis couldn't see his own tires in his mirrors as they were fogged up, so he had no idea his tyres had actually gone down to the canvas.
Lewis should of however been a bit more cautious into the pits. but his not like Alonso, Kimi and Massa. He's like Colin McRae, Flat out at every corner. Thats why he decided to fight for position with Kimi and thats also why he crashed out. Thats the stupid side of it.
Now as a rookie this year, wherever he finishes his done a good job. Thats something you can't take away from him. His beat his teammate World champion multiple times and has managed not to loose his head many more times than Alonso who has crashed out a darn sight more under much less testing situations. The amount of hate on these forums and silly arguments is shambolic. If you haven't got anything nice to say dont say anything at all.